Window lock and fastener



Q Dec. 22, 1931. c M w z K 1,837,604

WINDOW LOCK AND FASTENER Filed March 5, 1931 a mama-5 M- WIZEK ATTORNEYPatented Dec. 22, 1931 UNE'EED STATES CHARLES M. WIZEK, OF CLEVELAND,OHIO WINDOW LOCK AND FASTENER Application filed March 5,

My invention relates to window locks and fasteners, and in general myobject is to provide an efficient locking and fastening device of suchsimple construction that it may be produced at a low cost and alsoeasily at tached to a window sash and conveniently operated, all ashereinafter shown and described in greater detail and more concisely setforth in the claims.

In the accompanying drawings, Fig. 1 is a perspective View of a portionof a window and my improved fastening device mounted thereon. .Fig. 2 isa sectional view of the device assembled, and Figs. 3, 4, and 5, areperspective views of the three pieces comprising the working structure.

The invention comprises a window lock or fastener made in three parts orpieces, a substantially Z shaped base member A, a U- shaped clampingmember or slide B, and a thumb screw C. Base member A and clampingmember B are stamped or folded from flat strip'metal into theirrespective angular forms. Thus, base member A consists of a flat stripof metal folded at right angles on parallel lines, transversely thereofto provide a base flange 2, a vertical wall 3, and a forwardlyprojecting top flange 4. Base flange V 2 is provided with countersunkscrew-open ings 5 to permit this member A to be secured rigidly in anupright position upon the upper rail 6 of a window sash D opposite thestile 7 of a second sash E. The vertical wall 3 in member A is formedwith a flanged opening 8 which is screw-threaded to receive thumb screwC, one end of which is provided with a flattened thumb-engaging portionor handle 9. The opposite end of screw 0 has a reduced extension 10which passes through a flanged opening 11 in the vertical wall 12 of theclamping member or slide B to provide a rotatable or swiveled connectiontherefor when the outer end of this reduced extension is upset. Thestock around opening 11 is flanged inwardly to provide a countersunk1931. Serial. No. 520,329.

recess or cavity 14 wherein the enlargement 15 on the outer end of thescrew may be seated in a retired position in respect to the flatvertical clamping face 16 of slide member B, thereby preventing injuryor marring of the stile on window sash E when the screw is rotated andslide member B is pressed tightly against the stile.

Slide member B is confined upon the upper rail 6 of lower sash D by theoverhanging flange 4 of stationary member A, but is free to slide backand forth in respect to the upper sash when operated by screw O. MembersA and B being made of flat bendable metal, for example, spring brass, acertain measure or degree of flexibility or spring exists inherently inthe structure, whereby the clamping strain on the device and on theattachment screws is relievedunder extreme stress. Also when the lockingmember B is; clamped againstthe upper sash by the pressureof the screwthe tendency of the device is to 'jamb more tightly against the uppersash with spring locking effect. The screw is, also lo cated above thehorizontal medial line in the device to slightly accent such results andto elevate the thumb piece sufficiently in respect to the base flangeend sash so that'the screw may be rotated freely by the thumb andfingers without interference with the base flange and sash. i

What I claim, is: f 1. As an article of manufacture and sale, a windowlock or fastening device, comprising a base member made of fiat springmetal folded at right angles to provide a base flange, a vertical walladjoining said base flange, and an overhanging flange extending fromsaid vertical Wall; a clamping member slidably engaged with saidoverhanging flange; and a clamping screw extending through the saidverticalwall having swivel connection with said clamping member. 1 3 2.As an article of manufacture and sale, a

window lock or fastening device, comprising Q I a base member made offlat spring metal folded into Z shape having its Vertical Wall providedwith a screw-threaded opening in its upper portion; a clamping membermade of fiat stock folded into substantial Ushape; and a clamping screwextending through said opening insaidbase member, having rotatableconnection with the upper portion of the I Web of said clamping member.

,4 In testimony whereof I affix my signature. CHARLES M. WIZEK.-

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